Collar for pipes or tubes.



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ed June 2e, 1899.)

(No Model.)

FRIEDRICH IVILHELM BARTI'IELS, OF HAMBURG, GERMANY.

COLLAR FOR PIPES OR TUBES.

SPECIFICATION forming part of Letters Patent No. 639,010, dated December12, 1899. Application iiled .Tune 26,1899. Serial No. 721,952. (Nomodel.)

T0 @ZZ whom it may concern:

Be it known that I, FRIEDRICH WILHELM BARTHELS, a subject of' the GermanEmperor, residing at Hamburg, in the German Empire, have invented newand useful Improvements in Collars for Pipes or Tubes, (for which I madeapplication for patent in Germany June 5, 1899, German Design PatentJune 5, 1899, and application for patent in Great Britain J une 7,1899,) of which the following is a specification.

Hitherto the method adopted for securing flanges or collars to tubesconsists in introducing the tube into the opening of the annular flangeand then applying clay to the rear of the ange to hold a suflicientamount of solder. By means of heat the solder is melted to connect thetube with its ange.

Great care has to he taken that the molten-v solder does not melt awaythe metal of either the flange or tube or cause a gutter to be formedthrough which the metalruns off, with the result that the pipe isdamaged.

My invention obviates the weakening of the tube, yet the connectionbetween it and the flange or collar is a more secure one.

In order that the invention may be understood and readily carried intopractice, Iwill describe the same with reference to the accom panyingdrawings, in which* Figure 1 is a section taken on the lineA B of Fig.3. Fig. 2 is a part plan of a tube and flange. Fig. 3 is a longitudinalsection of the same, showing the connection of the parts.

The collar a is formed with a flange l), in the under side of which isformed an annular groove c and a number of longitudinal grooves d,extending at rightangles through said annular groove. The tube e isintroduced into the Iiange and spunor hammered into the annular groovec, thereby securing it to some extent. .Clay is then applied to the rearof the flange, and the grooves cl are filled with hard solderf, and theflange, with the solder therein, is heated from the front. The groovesare so distributed as to leave enough material in the form ofprojections g in the flange to pre vent the molten solder from damagingthem. Thus the tube is firmly secured by being first hammered or spuninto the annular groove c and then by brazing the solder in the groovesforming intervals in regular order through the said annular groove.

If desired, a second groove h may be pro` vided for the purpose ofreceiving the edge of

